A man and a woman have arrived at an English country house to spend a quiet weekend in the depths of Wiltshire. The man is top KGB agent Ivan Sasanov. The woman is Davina Graham, one of British Intelligence's key operatives. Between these two very different people a strange, emotion-charged relationship has developed. The only person with whom Ivan feels any rapport is Davina and Davina is falling in with him. Leading to an almost impossible mission, ringed by treachery and counter-treachery.